TY  - BOOK
AU  - De, Anil Kumar
AU  - De, Arnab Kumar 
TI  - Environmental studies
SN  - 8122416047
U1  - 363.7 
PY  - 2005/// (2008 reprint)
CY  - New Delhi ; Kolkata
PB  - New Age International
KW  - Environmental sciences
ER  -